# coding: utf-8

def swap(a, b):
    # 下面代码实现a、b变量的值交换
    a, b = b, a
    print("swap函数里，a的值是", \
          a, "；b的值是", b)


a = 6
b = 9
swap(a, b)
print("交换结束后，变量a的值是", \
      a, "；变量b的值是", b)
